Originally Posted by
120mm
Your understanding of infantry rifle historical accuracy is not correct: The accuracy requirement for infantry rifles has not changed since the advent of smokeless powder, and the Krag-Jorgensen.
In fact, the M16/M4 family of rifles/carbines exceed the accuracy requirement better than any previous family of US infantry rifles.
MOA in a combat rifle is complete and utter bullshit, and attempting to get there is a waste of money, that can be spent better on other items, such as ergonomic concerns.
Until, that is, the method of employment can be improved to make use of the kind of accuracy you speak of. 4 MOA rifles to a 2 MOA training standard equals kills up to 200 m on a reliable basis.
Anything better than that, and you are better off working on crew-served and sniper employment issues with your lower level leadership.